How to turn a photo into a crochet pattern
- Prepare your photo. Pick a photo with clear subject matter and good contrast — pets, portraits, landscapes, and logos all work well. Crop tightly to the subject if needed; square or near-square aspect ratios produce the cleanest crochet grid.
- Upload to the Studio. Drag and drop your image into the Studio, or click to browse. JPG, PNG, and WebP files up to 10 MB are accepted. The image is processed locally in your browser before being sent to the AI for colour quantisation.
- Choose your colour count. Select how many yarn colours you want in the final pattern — anywhere from 2 to 32. Beginners should start with 4 to 8 colours for a bold, easy-to-follow pattern; advanced makers can use 16 to 32 for photo-realistic detail.
- Pick your stitch mode. Choose Single crochet (sc) for a tight, pixel-accurate grid worked in rows — best for amigurumi and detailed pieces. Choose Corner-to-corner (C2C) for diagonal blocks worked from one corner to the opposite — faster for large wall hangings and blankets.
- Set your grid width. Choose a grid width between 20 and 200 stitches. A 60-stitch wide grid makes a small wall hanging (~30 cm); a 120-stitch wide grid makes a large blanket (~120 cm). Height is calculated automatically from your image's aspect ratio.
- Generate and preview. Click Generate. The AI quantises your image to the chosen colour palette, maps each pixel to a stitch, and renders a preview grid. You can adjust colours, regenerate, or swap individual yarn colours before exporting.
- Export your pattern. Download your pattern as PDF (printable, with legend and row-by-row instructions), PNG (the colour grid for screen use), and CSV (stitch counts per colour for yarn math). The PDF also includes a recommended yarn kit with brand, weight, and approximate yardage.
Frequently asked questions
How do I turn a photo into a crochet pattern?
Upload any photo (JPG, PNG, or WebP) to the AeternaCraft Studio. The AI quantises the image to between 2 and 32 colours drawn from a real yarn palette, maps each pixel to a single crochet stitch, and generates a pixel-perfect grid with row-by-row written instructions and a corner-to-corner (C2C) tutorial. Your first pattern is free; no signup is required for the first generation.
What image formats and sizes can I upload?
The Studio accepts JPG, PNG, and WebP files up to 10 MB. Square or near-square images work best because crochet grids are typically rectangular. The tool automatically resizes your image to the grid width you choose (20 to 200 stitches), preserving the aspect ratio.
How many colours can I use in one crochet pattern?
You can choose any number of colours between 2 and 32. Fewer colours (4 to 8) produce a bold, graphic look and are easier to follow for beginners. More colours (16 to 32) capture photo-realistic detail but require more yarn colours and more frequent colour changes. The AI selects the optimal palette from a real yarn library so every colour is something you can actually buy.
What is the difference between single crochet (sc) and corner-to-corner (C2C)?
Single crochet (sc) pixel grid is the default mode: each pixel becomes one single crochet stitch, worked in rows from bottom to top. Corner-to-corner (C2C) mode maps each pixel to a small diagonal block (typically 3 chains + 3 dc), worked diagonally from one corner to the opposite. C2C is faster for large pieces and produces a distinctive diagonal texture; sc produces a tighter, more pixel-accurate grid.
What file formats can I export my crochet pattern to?
Every pattern exports to three formats: PDF (printable pattern with colour grid, legend, and row-by-row instructions), PNG (the colour grid image for screen use or social sharing), and CSV (stitch counts per colour, for advanced makers who want to plan yarn math). The PDF also includes a recommended yarn kit with brand, weight, and approximate yardage.
Is AeternaCraft Studio free to use?
Your first pattern is completely free — no signup required. After that, you can pay per pattern or subscribe for unlimited generations. The free first pattern includes all export formats (PDF, PNG, CSV) and the recommended yarn kit. Subsequent patterns require an account so we can save your project history and yarn kit recommendations.
Ready to try it? Upload a photo above or explore the free crochet planning tools.
Single crochet vs corner-to-corner: which mode should I pick?
| Consideration | Single crochet (sc) | Corner-to-corner (C2C) |
|---|---|---|
| How it works | One pixel = one sc stitch, worked in rows | One pixel = one diagonal block, worked corner to corner |
| Best for | Amigurumi and fine, pixel-accurate detail | Large wall hangings and blankets |
| Texture | Tight, flat pixel grid | Distinctive diagonal texture |
| Speed | Slower for large pieces | Faster — fewer, taller blocks to work |